© 2024 SOME RIGHTS RESERVED
The content of this web site is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.0 Germany License.
Journal of Thermal Science, 31, 882–894p. (2022) DOI:10.1007/s11630-022-1473-4
The main objective of this article was to experimentally investigate the dynamic response of diffusion flame under acoustic excitation in a laboratory-scale burner. Two parametric variations of the burner, the burner inlet length and variation of the airflow rate, were studied. Experimental results were analyzed through nonlinear time series analysis and several resonance characteristics were obtained. Results indicate that the flame-acoustic resonance only appears under certain frequencies together with the fuel tube vibration. Resonance characteristics of the combustion chamber and air inlet in the non-premixed burner indicate quasi-periodic or limit cycle oscillations, respectively. Flame-acoustic resonance would trigger the frequency and amplitude mode-transition in burners. Moreover, the intermittency of flame heat release was observed under variation of inlet length and airflow rate in the burner; the 445 mm case shows more frequency peaks and fluctuations than the 245 mm one. Four typical flame forms were examined during the flame-acoustic resonance conditions, evolves from wrinkled flames to diverged flames, then evolves to reattached flames and finally to blow-off flames. This study proposed the practical application of nonlinear time-series analysis method as a detection tool for flame-acoustic resonance in laboratory non-premixed burners, which could contribute to the detection and prevention of potential thermoacoustic instabilities or resonance structure failures of industrial boilers. Finally, this study demonstrates an alternative to conventional linear tool for the characterization of nonlinear acoustic resonance in industrial boilers.
back
© 2024 SOME RIGHTS RESERVED
The content of this web site is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 2.0 Germany License.
Please note: The abstracts of the bibliography database may underly other copyrights.
Ihr Browser versucht gerade eine Seite aus dem sogenannten Internet auszudrucken. Das Internet ist ein weltweites Netzwerk von Computern, das den Menschen ganz neue Möglichkeiten der Kommunikation bietet.
Da Politiker im Regelfall von neuen Dingen nichts verstehen, halten wir es für notwendig, sie davor zu schützen. Dies ist im beidseitigen Interesse, da unnötige Angstzustände bei Ihnen verhindert werden, ebenso wie es uns vor profilierungs- und machtsüchtigen Politikern schützt.
Sollten Sie der Meinung sein, dass Sie diese Internetseite dennoch sehen sollten, so können Sie jederzeit durch normalen Gebrauch eines Internetbrowsers darauf zugreifen. Dazu sind aber minimale Computerkenntnisse erforderlich. Sollten Sie diese nicht haben, vergessen Sie einfach dieses Internet und lassen uns in Ruhe.
Die Umgehung dieser Ausdrucksperre ist nach §95a UrhG verboten.
Mehr Informationen unter www.politiker-stopp.de.